It took him half an hour _____ the work. A.doing B.to do C.did
________ interesting story it is! We all fall in love with it. A. How B. What a C. What an
When we got to the hospital, Mary _______ there. A. left B. has left C. had left
Students are supposed _______ school uniforms on school days. A. wear B. to wear C. wearing
—When ________ the telephone ________?—In 1876.A. is; inventedB. did; inventedC. was; invented
This dictionary______ Ellen’s. Look, her name is on it. A. must be B. can’t be C. might be